tree 356885f4321aa38f5d275fd869a5ef4a192d012f
parent e07e69499bf3717655157785d02a5c15e39b2569
author Chris Frantz <cfrantz@google.com> 1617752430 -0700
committer moidx <migue48@gmail.com> 1619467939 -0700

[mask_rom] Add a UART driver to the mask ROM.

1. Write a very simple transmit-only uart driver.
2. Utilize the driver for printf in the mask ROM.
3. Create unit tests for the driver.

Signed-off-by: Chris Frantz <cfrantz@google.com>